In this week's podcast: report on the 65th birthday of the National Survey of Health and Development from the BMJ; testing research - journalist Brian Deer talks about Andrew Wakefield and his discredited research on the MMR vaccine; and Hod Lipson on 3d printing - exciting new developments from Cornell University, in replacing traditional 3d printing materials with biological materials such as live cells.

Presented by Andrew Jack with Diana Garnham and Brian Deer in the studio and Clive Cookson on the phone.